プロフィール詳細

プロジェクトを作成

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Dr. Yordan K.に依頼

Bulgaria

Dr.-Ing. Materials Scientist & Process Engineer | Expert in Superalloys, Semiconductors & Advanced Data Analysis

プロフィール概要

I am a Doctor of Engineering (Dr.-Ing.) in Materials Science with over 8 years of experience at the intersection of high-performance metallurgy, semiconductor technology, and statistical process control. I specialize in solving complex R&D challenges where material properties limit engineering performance. Core Expertise: Specialized Expertise based on Doctoral Research: High-Entropy Alloys (HEAs) & Phase Stability: Deep knowledge of multicomponent systems (quinary alloys). Expert in predicting and analyzing deleterious phases (e.g., Sigma phase) using DSC (Differential Scanning Calorimetry) and heat treatment protocols.Small-Scale Mechanics & Fracture Toughness: Proficiency in estimating Fracture Toughness ($K_{Ic}$) and hardness of extremely brittle materials using Nanoindentation, eliminating the need for bulk tensile specimens.Failure Analysis: Root cause analysis of thermal stress cracking due to elastic anisotropy and grain boundary incompatibilities. Thin Films & Semiconductors: Proven track record in process validation and characterization of thin-film systems. Expert in Nanoindentation and high-precision metrology. Equipment Commissioning: Experience in leading Factory Acceptance Tests (FAT) and Site Acceptance Tests (SAT) for complex analytical setups (e.g., Hysitron systems). Data Science for Engineering: Proficient in using Python and statistical algorithms to analyze large experimental datasets, perform risk assessments (FMEA), and optimize manufacturing parameters. Whether you need a rigorous technical feasibility study, a root-cause analysis for a failing component, or experimental design (DoE) optimization, I bring "German Engineering" discipline combined with flexible, remote-first consulting.

専門分野

• ★ Metallurgy
• ☆ Materials Science & Engineering
• ☆ Nanotechnology & Nanomaterials
• ☆ Ceramic Engineering
• ☆ Corrosion
• ☆ Aerospace Engineering
• ☆ Electrical Engineering
• ☆ Semiconductors
• ☆ Mechanical Engineering
• ☆ Tribology
• ☆ Data Analysis
• ☆ Image Processing
• ☆ Data Processing
• ☆ Statistics
• ☆ Applied Statistics
• ☆ Study Design
• ☆ Trend Analysis
• ☆ Risk Assessment & Actuarial Science
• ☆ German
• ☆ Technical & Scientific Writing
• ☆ Manuscript & Journal Article Writing
• ☆ Experimental Protocols
• ☆ Project Management

サービス

• Writing
• Research
• Consulting
• Data & AI
• Product Development

Writing Non-Medical Regulatory Writing, Technical Writing

Research Market Research, Feasibility Study, Technology Scouting, Gap Analysis, Scientific and Technical Research, Systematic Literature Review

Consulting Business Strategy Consulting, Operations Consulting, Scientific and Technical Consulting, Financial Consulting, Manufacturing Consulting

Data & AI Predictive Modeling, Statistical Analysis, Data Visualization

Product Development Product Evaluation, Product Validation, Manufacturing, Quality Assurance & Control (QA/QC), Concept Development, Prototyping, Reverse Engineering, Device Fabrication

職務経験

Independent Technical Consultant

Freelancer

10月 2023 - 現在

Co-Owner, Co-Founder

FinTech Start-up (Bulgaria)

1月 2024 - 9月 2025

PostdoctoralResearcher

Ruhr-Universität Bochum

7月 2022 - 7月 2023

Researcher, Research Associate

Ruhr-Universität Bochum

6月 2018 - 6月 2022

Graduate Research Assistant / Research Assistant

Ruhr-Universität Bochum

1月 2017 - 6月 2018

Interniship

Bonago GmbH

10月 2016 - 12月 2016

Reaearch Assistant

Ruhr-Universität Bochum

4月 2016 - 9月 2016

学歴

Dr.-Ing.

Ruhr-Universität Bochum - Germany

6月 2018 - 7月 2022

M.Sc. Sales Engineering and Product Management

Ruhr-Universität Bochum - Germany

11月 2015 - 5月 2018

B.Sc. Sales Engineering and Product Management

Ruhr-Universität Bochum - Germany

10月 2011 - 10月 2015

認定資格

• Cambridge English Business Higher (BEC)

  Cambridge Assesment English

  https://www.cambridgeenglish.org/why-choose-us/higher-education-institutions/how-to-verify-results-online/

  5月 2019 - 現在

• Cambridge Advanced English Certificate

  Cambridge Assesment English

  https://www.cambridgeenglish.org/why-choose-us/higher-education-institutions/how-to-verify-results-online/

  12月 2018 - 現在

• SAP Certified Associate - Business Process Integration with SAP ERP 6.0

  SAP Global Certification

  4月 2016 - 現在

• Prince2 Foundation

  People Cert

  3月 2024 - 3月 2026

出版物

JOURNAL ARTICLE

Yordan Kalchev, Jean-Marc Joubert, Andrea Fantin, Jean-Claude Crivello, Rico Zehl, Erik Elkaim, Guillaume Laplanche (2023). Site occupancies in a chemically complex σ-phase from the high-entropy Cr–Mn–Fe–Co–Ni system . Acta Materialia.

Yordan Kalchev, Jingfeng Zhang, G. Mohan Muralikrishna, Alex Asabre, Julian Müller, Benjamin Butz, Sven Hilke, Harald Rösner, Guillaume Laplanche, Sergiy V. Divinski, et al.(2021). Tracer diffusion in the σ phase of the CoCrFeMnNi system . Acta Materialia. 203. Microsoft.AspNetCore.Mvc.Localization.LocalizedHtmlString 116498. Elsevier {BV}